2006 BMW 525 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW 525. In addition, the cost of maintenance, including insurance, on 2006 BMW 525 would be higher. At 3,246 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (338 HP @ 7900 RPM) has 123 more horse power than 2006 BMW 525. (215 HP @ 6500 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2006 BMW 525.
Because 2006 BMW 525 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2006 BMW 525 will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2007 BMW Z4 (365 Nm @ 4900 RPM) has 115 more torque (in Nm) than 2006 BMW 525. (250 Nm @ 2750 RPM). This means 2007 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 525.
Compare all specifications:
| 2006 BMW 525 | 2007 BMW Z4 | |
| Make | BMW | BMW |
| Model | 525 | Z4 |
| Year Released | 2006 | 2007 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 3246 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 338 HP |
| Engine RPM | 6500 RPM | 7900 RPM |
| Torque | 250 Nm | 365 Nm |
| Torque RPM | 2750 RPM | 4900 RPM |
| Engine Bore Size | 78.9 mm | 87 mm |
| Engine Stroke Size | 82 mm | 91 mm |
| Engine Compression Ratio | 11.0:1 | 11.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 8.5 seconds | 5 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Length | 4850 mm | 4120 mm |
| Vehicle Width | 1850 mm | 1790 mm |
| Vehicle Height | 1500 mm | 1310 mm |
| Wheelbase Size | 2840 mm | 2500 mm |
| Fuel Consumption Overall | 9.9 L/100km | 12.1 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
